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OS-M1 [OneSpace]

OS-M4 [OneSpace]

OS-M is a small solid fuel orbital rocket designed by the Chinese company OneSpace.

The OS-M1 version consists of a three stage core. The OS-M2 version is augmented by two and the OS-M4 version by four strap-on motors.

Reportedly the OS-M rockets use demilitarized solid rocket motors from retired missiles. Stage one has a fixed nozzle with steerable thrust vanes and fins. Stage two, which is identical to stage one, uses only thrust vanes and no fins and stage three, identical to the OS-X prototype, uses only thrust vanes.

Possibly an additional post boost stage for trim maneuvers and apogee rising is also included.

Version Stage 1 Stage 2 Stage 3 Stage 4
OS-M1 ? ? ? -
OS-M2 2 × ? ? ? ?
OS-M4 4 × ? ? ? ?
Performance (kg) LEO LPEO SSO GTO GEO MolO IP
OS-M1 205 73 - - - -
OS-M2 390 204 - - - -
OS-M4 553 307 - - - -
No:         Type               Date          LS         Payload



 1      1   OS-M1              xx.03.2019 *  Jq         Lingque 1B

Launch sites:

Alx = Alxa Left Banner Airport, Inner Mongolia, China ChinaJq  = Jiuquan Space Center, Inner Mongolia, China China